202results about How to "Uniform internal organization" patented technology

The extrusion apparatus for preparing superfine crystal block material has one structure comprising a die holder, a connecting seat, a conic die case, a conic die core, a wedged extruding rod with reduced extrusion force to avoid cracking of the block, a turning unit, a square vertical channel, a square horizontal channel and a product outlet. The product has high crystal grain fining and smooth surface, and the extrusion apparatus has simple structure, excellent mechanical performance, easy installation and use, and no pollution.

The invention relates to a GH3600 alloy fine thin-walled seamless pipe manufacturing method, which comprises: adopting methods of vacuum induction smelting and electroslag remelting smelting to smelt a casting ingot meeting requirements; adopting a 2000 or 4000 ton rapid forging and 1300 ton radial forging thermal combined forging process to carry out cogging on the casting ingot so as to ensure complete crushing of the thick and large structure of the casting ingot, produce the round pipe billet with the uniform structure, increase the plasticity of material, and saves energy consumption; adopting a hot extrusion process to produce a lateral so as to ensure the uniformity of the internal structure of the lateral and the high quality of the external surface of the lateral, and make the performance of the produced finished product pipe excellent; and adopting a multi-pass cold rolling and cold drawing process and the matched heat treatment process, and assistedly adopting the special lubrication process and the cleaning process to control the structure and the high performance of the pipe so as to finally obtain the GH3600 alloy fine thin-walled pipe with characteristics uniform and fine pipe structure and high comprehensive performance.

The invention discloses a method for manufacturing directional silicon steel. The method is characterized in that a rolling and treating process adopts a manufacture process of triple cold rolling, twice intermediate annealing, and once MgO coating, and finally carrying out high temperature annealing. One-pass roll separating force in the triple rolling is reduced, the internal tissue of the steel is uniform, so the time for high temperature annealing is reduced by 20 to 30 percent, and a product with strong (110)[001] structure is finally obtained. The method not only can obviously improve the electromagnetic performance (iron loss reduces but magnetic induction increases), ensures that the iron loss P1.7 is reduced by about 0.08W / kg, ensures the magnetic induction B8 is improved by about 0.07T, not only ensures that the product is improved from half to one grade, but also ensures that the total production time is obviously reduced, the total production time is remarkably shortened, thereby improving the manufacture efficiency of the directional silicon steel.

The invention relates to a hot upsetting process, in particular to a hot upsetting process for a cast ingot with a large height to diameter ratio for an ultra large ring forging. The process is characterized by comprising the following steps of: 1) hanging a heated high-temperature cast ingot with a large height to diameter ratio on a lower female die; 2) adjusting the position of an upper male die so as to ensure that the central line of the upper male die is coincided with the central lines of the cast ingot and the lower female die; 3) driving the upper male die to move downward by using a power mechanism; 4) further moving the upper male die downward so as to continuously decrease the height to diameter ratio of the cast ingot; 5) reversing the cast ingot which is in a contact molding state by hot upsetting, replacing the lower female die by using a flat plate die and further lowering the upper male die; and 6) replacing the upper male die by using a flat plate die and further lowering the upper male die until the cast ingot is upset to a cast ingot with a required blank height and size so as to obtain an upset blank. On the premise of ensuring that the hot upsetting process of the cast ingot with the large height to diameter ratio is performed successfully, the process also ensures the stress, uniform strain distribution, small bulge and uniform internal structure of the unset blank after upsetting is finished and provides an unset blank with high performance for the manufacturing of a subsequent forging.

The invention relates to a hard alloy for a low-load high-speed punching precision mold. The hard alloy is prepared from the following components in percentage by mass: 62.09% to 63.49% of fine grain WC (Wolfram Carbide), 26.61% to 27.21% of coarse grain WC, 5.21% to 7.10% of Co powder, 2.47% to 3.87% of Ni powder and 0.8% to 1.3% of Cr3C2; the grain size of the fine grain WC is 0.9 to 1.5 microns; the grain size of the coarse grain WC is 1.9 to 2.8 microns. The hard alloy disclosed by the invention has the advantages of higher hardness, higher bending strength, better fracture toughness and good chemical resistance, is suitable for precision grinding and WEDM (Wire Electrical Discharge Machining) to manufacture high-grade precision punching mold components and parts, and can be used for low-load high-speed punching high-grade precision punching molds.

The invention provides a tantalum target and a manufacturing method thereof; the manufacturing method comprises the steps: firstly, performing a first forging to a tantalum ingot and obtaining a primary forged blank; performing a second forging and a first thermal treatment to the primary forged blank obtained in the previous step and obtaining a secondary forged blank; performing a third forging and a second thermal treatment to the secondary forged blank obtained in the previous step and obtaining a tertiary forged blank; performing a fourth forging and a third thermal treatment to the tertiary forged blank obtained in the previous step and obtaining a quartus forged blank; and finally, rolling and performing a fourth thermal treatment to the quartus forged blank obtained in the previous step and obtaining the tantalum target; the first forging is a rotary forging; the temperature of the first forging is 800-1400 degrees centigrade. The prepared tantalum target is uniform in texture distribution, small in grain size and capable of satisfying usage requirements in high-level semiconductor film-coating industries.

The invention relates to aluminum alloy for an automobile wheel hub and an automobile wheel hub production process. The aluminum alloy comprises: 0.4%-0.8% of Si, 0.8%-1.2% of Mg, 0.15%-0.4% of Cu, 0.7% of Fe, 0.15% of Mn, 0.25% of Zn, 0.15% of Ti and the balance being Al. The production process includes the following steps: S1, blank preparation; S2, blank forging pretreatment; S3, mold pretreatment; S4, forging; forging with a 55MN-65MN forging machine and packing for 20min-30min to obtain a forging blank; and S5, roll forming; before cooling, transferring a wheel hub into an aging treatment apparatus and heat preserving for 6h-8h at the temperature of 170 DEG C-190 DEG C. The aluminum alloy for the automobile wheel hub has the advantages that weight is light, heat dissipation is fast, strength is high, vibration reducing performance is good, service life is long, and waste wheel hubs can be recycled.

The invention provides a preparation method of a tantalum-tungsten material. The preparation method comprises the following steps of: (1) carrying out forging on a tantalum-tungsten ingot for the first time, and carrying out heat treatment on the tantalum-tungsten ingot subjected to the first-time forging for the first time; (2) carrying out forging on the tantalum-tungsten ingot obtained in the step (1) for the second time, and carrying out heat treatment on the tantalum-tungsten ingot subjected to the second-time forging for the second time; and (3) rolling the tantalum-tungsten ingot obtained in the step (2), and carrying out heat treatment on the tantalum-tungsten ingot subjected to rolling for the third time to obtain the tantalum-tungsten material. In the process of preparing the tantalum-tungsten material, two times of forging is carried out to ensure that internal crystalline gains of the ingot are fully crushed so as to obtain uniform internal organizations, and then rolling is carried out so as to ensure that the ingot is uniformly deformed in each direction, so that the material surely has uniform mechanical properties and microstructures in each direction. The invention also provides the tantalum-tungsten material prepared by the preparation method.

The invention discloses a paper-based friction plate and a manufacturing method thereof. A coating material of the paper-based friction plate is prepared by taking fibers as a skeleton, resin as a matrix, various oxides and graphite as fillings and organic friction powder and rubber as a regulator through processes of pulping, papermaking, drying, dipping in the resin, curing, laminating on a steel core plate, performing heat treatment and machining. In the production process for the paper-based friction plate, the conventional curing treatment and bonding aftertreatment are combined into 'curing treatment', so the quality and yield of products are improved, and energy consumption is reduced.

The invention discloses a hardening and tempering technology of an alloy-steel tube, and through the technology, the hardened and tempered alloy-steel tube is high in intensity and hardness, has good abrasion resistance and high plasticity, bears great pressure, and has small deformation and less decarburization. The technology comprises the following steps of: (1) annealing treatment: warming to 870-880 DEG C at the speed of 20-25 DEG C / minute, keeping the temperature for 35-40 minutes, and then cooling to 500 DEG C below; (2) quenching treatment: warming to 930-935 DEG C at the speed of 5-10 DEG C / minute, keeping the temperature for 50-60 minutes, then cooling rapidly at the speed of 190-200 DEG C / second to 320-325 DEG C, and cooling naturally to 30-40 DEG C; and (3) tempering treatment: warming to 500-510 DEG C at the speed of 5-10 DEG C / minute, then keeping the temperature for 230-240 minutes, and then cooling naturally to room temperature, thus the hardened and tempered alloy-steel tube is high in intensity and hardness, has good abrasion resistance and high plasticity, bears great pressure, and has small deformation and less decarburization. The hardening and tempering technology of the alloy-steel tube provided by the invention is mainly applied to the hardening and tempering of the alloy-steel tube for a hydraulic cylinder barrel.

The invention provides a production method of a nickel target and a nickel target component. The production method of the nickel target comprises the following steps of providing a nickel ingot; performing hot forging on the nickel ingot to form a first nickel target blank; performing first heat treatment on the first nickel target blank to form a second nickel target blank, wherein the temperature of the first heat treatment is 450-550 DEG C, and the temperature is maintained for 1-2 hours; after the first heat treatment, performing hot rolling on the second nickel target blank to form a third nickel target blank; performing second heat treatment on the third nickel target blank to form a fourth nickel target blank, wherein the temperature of the second heat treatment is 300-500 DEG C, and the temperature is maintained for 1-2 hours; after the second heat treatment, performing cold rolling on the fourth nickel target blank to form a fifth nickel target blank; performing third heat treatment on the fifth nickel target blank to form the nickel target, wherein the temperature of the third heat treatment is 200-300 DEG C, and the temperature is maintained for 1-2 hours. By adopting the technical scheme, the produced nickel target has relatively uniform internal organization and good magnetic property.

A high-purity oxygen-free copper tube target preparation process for sputtering, mainly used in the IC industry. Casting—heating—extrusion—primary stretching—annealing—secondary stretching—bright annealing—finishing—checking mechanical properties—storage process steps to achieve a purity of more than 99.99%, and impurities below 0.0003% P and 0.0002% Mn, Low-oxygen ultra-low impurity high-purity oxygen-free copper preparation, its purity is higher than the national standard TU1 material, with a purity of more than 99.97%, reaching the American standard C10100 standard, with a purity of more than 99.99%; processing technology research, using appropriate extrusion technology, suitable processing Rate, recrystallization annealing and other measures to make the internal structure of the material uniform and the grain size ≤ 0.080mm.

The invention provides a preparation method for aluminum silicon carbide and aluminum silicon carbide obtained with the method. The preparation method for aluminum silicon carbide comprises powder filling and aluminization, wherein in the powder filling step, a groove of an aluminum substrate is filled with powder and a powder plate is formed; an aluminum foil with the depth being 0.5 mm is laid on the surface of the powder plate; other additives except aluminum and silicon carbide are not added into aluminum silicon carbide. According to the preparation method for aluminum silicon carbide, the aluminum foil with the depth of 0.5 mm is laid on the surface of the silicon carbide powder and then aluminization is carried out, so that scouring of molten aluminum to a silicon carbide layer in an aluminization process can be prevented and an aluminum silicon carbide material obtained after the aluminization step is guaranteed to be uniform in internal structure. Moreover, the method provided by the invention keeps the bending resistance of the aluminum silicon carbide material under a condition that no additive is added, so that the thermal conductivity of the obtained aluminum silicon carbide material is increased to 250-280 W / mK.

The invention relates to a novel Al2O3 / ZrO2 powder material for SLM (selective laser melting) molding and a preparation method thereof. After molding by laser melting, the powder material forms an oral use Al2O3 / ZrO2 composite ceramic material which has uniform internal tissue structure and has no obvious phase segregation. According to the preparation method, an electro-magnetic induction heating furnace and a laser are used for carry out secondary preheating on a powder bed, after achieving the preset preheating temperature, the powder material is molded by laser melting. The gradient of the interior temperature and the exterior temperature of a molten pool in molding of the ceramic material can be effectively reduced, the interior thermal stress can be lowered, cracks on the surface and in the interior of the material are reduced, and the mechanical property of the material is improved. The SLM Al2O3 / ZrO2 composite ceramic material molded by the powder material through the preparation method has uniform internal tissues, has no phase segregation, has no obvious cracks on the surface and in the interior, has better mechanical property, and is expected to be used as a material of all-ceramic crown, bridge and inlay to be used in clinic of oral repair.

The invention discloses a preparation method of a SiC / stainless steel composite blood vessel stent material, which comprises the steps of material proportioning, material mixing and sintering. The invention provides an optimized process for preparing the SiC / stainless steel composite blood vessel stent material by a hot pressing sintering method. The method has the advantages that the surface potential of a metal stent is effectively reduced through the good semiconductor property of ceramic whiskers, so the anti-blood-vessel-narrowing function is given to the blood vessel stent material, and simultaneously, the goal of enhancing the anti-corrosive performance of the stainless steel is also realized. The SiC / stainless steel composite materials prepared by the method provided by the invention can be widely applied to the preparation of the blood vessel stent for medical purposes.

The invention discloses a method for manufacturing a TiAl intermetallic compound through heterogeneous double-wire TOP-TIG electric arc additive manufacturing, and belongs to the technical field of additive manufacturing. The method solves the problem that when the TiAl intermetallic compound is prepared through an existing electric arc additive manufacturing process, due to the fact that meltingcharacteristic differences of a titanium alloy welding wire and an aluminum welding wire are large, melting of the two wires is not synchronous under heating of the same electric arc, and the obtainedintermetallic compound is not uniform in component structure. According to the method, by regulating the angles and the positions of the welding wires and the extension length of a tungsten electrode, it is ensured that the heat absorbed by the two heterogeneous welding wires is different under heating of the same electric arc, the welding wires can be under the reasonable heating conditions correspondingly, synchronous continuous melting of the two welding wires is achieved, and a TiAl intermetallic compound component uniform in component structure is obtained. By means of the method, the problem that melting of the heterogeneous double wires is not synchronous when the intermetallic compound is manufactured through existing TIG electric arc additive manufacturing is effectively solved,the intermetallic compound manufacture process interval is widened, and stability of the manufacturing process is improved.

The invention discloses a method for casting a blade, which is a method for casting blades by adopting precise casting. The method comprises the following steps: designing a die; manufacturing the die; melting raw materials; preparing blanking; centrifugally casting; cooling for the first time, molding for the second time, and cooling for the second time; trimming, and performing shot blasting; performing hot isostatic pressing. By virtue of the steps of the method, an excellent elimination factor of surface and internal defects of the blade of an engine can be guaranteed, and the internal microscopic tissues can be more uniform.

The invention discloses a thermal treatment method of a 3D printing thin-walled part with AlSi10Mg as a substrate and the 3D printing thin-walled part and belongs to the technical field of aluminum alloy thermal treatment. The thermal treatment method includes the steps that the thin-walled part is annealed, and then high-low-temperature circulating treatment is performed in the high-temperature interval with the high-temperature ranging from 160 DEG C to 190 DEG C and the low-temperature interval with the low-temperature ranging from -60 DEG C to -50 DEG C. By the adoption of the method, through annealing treatment and high-low-temperature circulating treatment, the inner structure of the thin-walled part is more even and more stable, the inner stress of the part is reduced, the stability of the size of the part at different temperatures is improved, product quality is guaranteed, and the change of the size of the part is minimum under different temperature conditions. The 3D printing thin-walled part obtained through the method can be used for products such as a helmet displayer.

A low-sugar highly nutrient gluten-free bread production method belongs to the technical field of food processing. According to the low-sugar highly nutrient gluten-free bread production method, coarse rice powder and buckwheat powder serve as main raw materials, and low-sugar highly nutrient gluten-free bread is finally obtained through a series of processes of gluten-free bread moisture determination, flour paste preparation, fermentation, baking and the like. The low-sugar highly nutrient gluten-free bread production method comprises the steps of ultra-micro-pulverizing coarse rice and buckwheat and mixing the ultra-micro-pulverized coarse rice and buckwheat in proportion; adding saccharomycete into white granulated sugar after the white granulated sugar is completely dissolved in warm water for activation, and then mixing the white granulated sugar with the coarse rice powder and the buckwheat powder; sequentially adding salt, isomaltooligosaccharide, xanthan gum, sodium alginate, compound enzyme preparation (tyrosinase and laccase) and water into the mixture for mixing, performing stirring, adding sunflower seed oil into the mixture, pouring flour paste into a mold, vibrating the flour paste evenly, placing the flour paste after fermentation, cooling the bread and slicing the bread. The color of the gluten-free bread produced through the low-sugar highly nutrient gluten-free bread production method resembles whole wheat bread, and the gluten-free bread is attractive in fragrance and good in every aspect such as specific volume and viscoelasticity, has no collapse on the surface, is nutrient and healthy and is particularly to patients with the coeliac disease.

The invention belongs to the technical field of forge piece forging, and particularly relates to an integral forging and forming method for a large-scale end socket forge piece of a nuclear reactor with a plurality of protruding nozzles. A cylindrical blank is prepared through implementation of the processes of removal of a head and a tail of a steel ingot, drawing out of upsetting, rolling and blanking and the like, and moulding bed formation is implemented on the cylindrical blank by adopting a flat-anvil male-die subarea rotary rolling and forging method, so that filling forming of the shapes of the nozzles of a middle prefabricated slab is achieved through a free forging method by means of a moulding bed. According to the integral forging and forming method for the large-scale end socket forge piece of the nuclear reactor with the multiple protruding nozzles, the shape and the size of the prefabricated slab can be effectively controlled, metal of the prefabricated slab is reasonably dispersed, and the situations that the internal organization is even, forming process line is distinct, the fibrous structure is good, and the contour shape is intact are achieved. Hot stamping technology deformation belongs to the scope of large displacement and small strain in nature, and the needed press machine loading force is small; hot stamping integral forming is easy to control the shape of a big end socket forge piece product, the heat loss in the forming process of the big end socket forge piece product is small, the heating temperature of a blank is low, the time is short, so that finish-forging formed grains are controlled to grow up, and the product quality is guaranteed.

The invention relates to the technical field of water wiping devices for casting hard aluminum alloy cast ingots, in particular to a water wiping device for casting hard aluminum alloy. According to the water wiping device for casting the hard aluminum alloy, the water wiping device is arranged below a crystallizer, water wiping rings with the shape of openings identical to that of the section of a cast ingot are arranged, and the water wiping device comprises a fixing device, a water wiping device frame, the water wiping rings and drainage openings. One end of the fixing device is connected with the outer wall of the water wiping device frame, and the other end of the fixing device is provided and connected with the crystallizer. The water wiping rings are arranged at the bottom end of the water wiping device frame, and the drainage openings are formed in the side wall of the water wiping device frame. The integral type water wiping device frame and the high temperature resisting fluororubber water wiping rings are adopted, the water sealing performance is increased, it is guaranteed that in the casting process, after the cast ingot passes through the water wiping device, cooling water cannot be leaked out of clearances to flow to the surface of the iron casting, and local supercooling of the cast ingot cannot occur, the probability that the cast ingot is cracked can be greatly lowered, the casting success rate of hard aluminum and superhard aluminum alloy slab ingots or round ingots is improved, and the water wiping device is suitable for casting the hard aluminum alloy cast ingot of the large specification.

The invention discloses a method for producing a steel sectional material of an air valve. The method comprises the steps of: (1) carrying out solution treatment on a rolled sectional material; (2) removing an oxidation layer from the sectional material subjected to the solution treatment; (3) plating by using heated lime slurry; (4) pointing one end of the rolled sectional material; (5) burying and lubricating, and heating and drawing the heated sectional material; (6) carrying out solution heat treatment on the drawn sectional material; and (7) straightening and polishing the sectional material subjected to the solution heat treatment. The formula of the lime slurry for plating in the step (3) is characterized in that 2 parts by weight of lime and 8 parts by weight of water are heated to 80-100 DEG C, and the plating time is 5-8 minutes. In the step (5), an electric heating method is used for the rolled sectional material, and the heating temperature is 400-920 DEG C; and a formula of a lubricant in the step (5) comprises the following components in parts by weight: 6 parts of carbon powder, 3 parts of soap powder and 1 part of sulfur. The method is characterized in that the produced steel sectional material has uniform inner crystal texture, annealing and acid washing processes are omitted, the production cost is reduced and the production efficiency is improved.

The invention relates to a spinning method of a GH4169 nickel base alloy bottom-carried cylindrical part. The spinning method comprises the following steps: (1) a GH4169 nickel base alloy blank is prepared; (2) a core mold is preheated before spinning; (3) a nickel base alloy plate is heated in a heating furnace or directly heated on the core mold for spinning formation; and a lubricating agent is uniformly coated during spinning; (4) the spinning formation is performed on a spinning machine; (5) the spinning final formation is performed; after final formation, the annealing is performed in a vacuum furnace; and the furnace cooling or the air cooling is performed; and (6) a spun part is machined. The invention finds out a hot spinning process aiming at the GH4169 nickel base alloy bottom-carried cylindrical part; the material waste problem in the production process of the nickel base alloy bottom-carried cylindrical part can be reduced; and huge economic benefit and social benefit are achieved.

The invention discloses a rolling forming method of a constructional steel special-shaped section ring element and aims to roll a complex special-shaped section ring-type element which is complete in appearance, high in size accuracy and good in structure and performance, and is distributed along the external shape of the element. The technical scheme is that after being heated, constructional steel bar materials which are discharged according to specifications are formed into a rectangular pre-rolling semi-finished product through upsetting, punching and looping rolling; after being heated, the rectangular pre-rolling semi-finished product is rolled into a special-shaped pre-rolling semi-finished product by a pre-rolling inner forming module and a pre-rolling outer forming module in a pre-rolling special-shaped hole pattern, wherein the shape of the special-shaped pre-rolling semi-finished products are opposite to that of a finished rolling special-shaped section ring element; after being heated, the special-shaped pre-rolling semi-finished product is rolled into a special-shaped section ring element by a finished inner forming module and a finished rolling outer forming module, in the rolling process, the special-shaped pre-rolling semi-finished product widens along a radial direction in the finished rolling groove, and the metal inside the special-shaped pre-rolling semi-finished product flows from a place with more metal to a place with less metal according to preset volume flow rates. The ring element is mainly used for barrel-type revolved bodies of an aviation aircraft.

The invention relates to a deflection scanning control method for electron beam welding of dissimilar alloy sheets. The method comprises steps as follows: an electrified defection coil is arranged at the output end of an electron beam channel and at the output side of a focusing coil of an electronic gun, so that focused electron beams produce deflection scanning beam currents under the function of Lorentz force in a magnetic field; by controlling the magnitude of electricity input into the deflection coil, deflection scanning parameters of the electron beams can be controlled, electron beam spots with heat input energy in Gaussian distribution can be obtained, when the dissimilar alloy sheets are subjected to electron beam welding, heat input energy of the electron beam spots acting on the alloy sheet with a low melting point and that of the electron beam spots acting on the alloy sheet with a high melting point are P0 and P1 respectively, and P0 is smaller than P1. With arrangement of the electrified deflection coil, a deflection scanning magnetic field can be controlled to control offset of the electron beams accurately, more energy is input to the side with a high melting point, less energy is input to the side with a low melting point, so that heat input can be controlled accurately during welding, and welded joints with better performance can be obtained.

The invention discloses a method for rolling and forming a GH4169 high-temperature alloy complicated irregular cross section annular part and aims at providing complicated irregular cross section annular parts which are complete in appearance, high in dimensional accuracy and excellent in texture and performance and are distributed along the part appearances. The technical scheme is that the method comprises the steps of heating a GH4169 high-temperature alloy rod blanked according to specification and performing upsetting, punching and twice small-deformation annular rolling to form a rectangular pre-rolling blank; heating the rectangular pre-rolling blank and using a pre-rolling inner shape module and a pre-rolling outer shape module to roll the rectangular pre-rolling blank in a pre-rolling irregular hole to form an irregular pre-rolling blank with a structural shape adverse to a structural shape of a final rolling irregular cross section annular part; and heating the irregular pre-rolling blank and using a final rolling inner shape module and a final rolling outer shape module to roll the irregular pre-rolling blank in a final rolling irregular hole to form an irregular cross section annular part, wherein metal inside the irregular pre-rolling blank in the final rolling irregular hole flows from most to least according to preset volume flows when widened along the radial direction in rolling. The annular part is mainly used as a rotary body part for cylindrical casings and the like in the fields of aerospace and the like.

The invention provides a high-silicon and high-copper aluminum alloy, which comprises 9 to 11 weight percent of Si, 6.5 to 8.0 weight percent of Cu, 0.5 to 1.0 weight percent of Mg, 0.5 weight percent of Fe, 0.3 weight percent of Mn, 0.2 weight percent of Cr, 0.2 weight percent of Zn, 0.2 weight percent of Ti and the balance of aluminum. The invention also provides a preparation method for the high-silicon and high-copper aluminum alloy. The method comprises the following steps of preparing an aluminum alloy ingot, performing hot extrusion on the prepared aluminum alloy ingot to obtain an aluminum alloy profile, quenching the aluminum alloy profile, and performing aging treatment on the quenched aluminum alloy profile. According to the high-silicon and high-copper aluminum alloy and the preparation method thereof, proper temperature for quenching treatment and aging treatment is selected, so that the strength and toughness of the prepared aluminum alloy profile are well matched, and production requirements are met.

The invention relates to the field of rolling methods for ring parts, in particular to a rolling method of a 6061 aluminum alloy ring part with an ultra-large diameter and a special-shaped section. The rolling method comprises the following steps of blanking, heating and heat preservation of a cast ingot, free forging, manufacturing of a rectangular ring blank, manufacturing of the ring part withthe special-shaped section, cooling of the ring part, solid solution, aging treatment, and dimension detection. The rolling method has the advantages that the streamline of a forged part can be kept complete, the internal tissue is uniform, welding is not needed, the machining cycle is short, the material utilization rate is high, and the subsequent machining allowance is small.

The invention discloses a precision casting method for engine vanes. The method comprises the steps of die designing, die manufacturing, raw material smelting, material preparing, centrifugal casting, primary cooling, post forming, secondary cooling, trimming, sand blasting and hot isostatic pressing. By means of the working procedures, the good elimination rate of defects of the surfaces and the interiors of the engine vanes can be ensured, and internal microstructures are more uniform.

The invention discloses an injection forming method of a soft magnetic ferrite material.The method comprises the following steps of: 1) powder preparation: mixing and milling ferrite powder at one time, after dryness, presintering the powder, crushing the presintered powder for secondary mixing and milling, and performing drying treatment, 2) mixing and granulation: uniformly mixing the powder obtained in Step 1) with an adhesive, mixing to form a mixture, crushing the mixture, 3) injection forming: heating the crushed mixture, injecting into a mold cavity under a pressure condition, opening a mold for cooling, then obtaining a forming body, 4) degreasing: putting the forming body in trichloro ethylene for degreasing, drying, and then performing heat degreasing, and 5) sintering: sintering the degreased forming body to form the soft magnetic ferrite material.The method is suitable for preparing middle and small high-precision ferrite core devices in complicated shapes, and the prepared soft magnetic ferrite material has the characteristics of large and uniform density, uniform internal structure, high mechanical strength and relatively low iron loss.